Monday, April 24, 2017

[Fungi • 2017] Tricholoma highlandense & T. sinopardinum • New Species in the Tricholoma pardinum Complex from Eastern Himalaya


Tricholoma sinopardinum 
  Zhu L Yang, X.X. Ding, G. Kost & Rexer


Abstract 

Species of Tricholoma sect. Pardinicutis (Singer) Bon are relatively easily recognizable even in the field, and the type species of section, T. pardinum (Pers.) Quél., was reported from the eastern Himalaya and adjacent areas. However, such reports were largely based on superficially similar morphology. In this study, we have generated DNA sequences of samples from southwestern China, and found that there are molecular discrepancies between the Chinese collections and European ones. Further detailed morphological analyses indicated the two independent new species occur in southwestern China, one in subtropical coniferous forests mixed with fagaceous plants between 2400 and 2800 m altitude, the other in subalpine dark coniferous forests between 3300 and 4100 m altitude. Consequently, two new species, namely, Tricholoma highlandense and T. sinopardinum, are described and illustrated.

Keywords: Agaricales, poisonous mushrooms, species delimitation, Fungi, Himalaya


Taxonomy 

Tricholoma highlandense Zhu L Yang, X.X. Ding, G. Kost & Rexer, sp. nov.  

Etymology:— highlandense is proposed because of its occurrence on Yunnan Plateau.

Tricholoma sinopardinum (HKAS 58001). Bars = 2 cm
Photo by Q. Cai and Z.L. Yang 

Tricholoma sinopardinum Zhu L Yang, X.X. Ding, G. Kost & Rexer, sp. nov.  

Etymology:— sinopardinum is proposed because of the Chinese mushroom’s similarity to T. pardinum
Type:— China. Xizang Autonomous Prefecture (Tibet): Jiangda County, Jiangda Town, alt. 3500 m, in forest dominated by Picea sp. and Populus sp., 8 August 2013, B. Feng 1427 (HKAS 82533!).

Habit, habitat, and distribution:— Solitary to scattered on calcareous soil in forests dominated by Picea spp., and sometimes mixed with Betula spp., Populus spp., or Quercus spp.; fruiting in summer in southwestern China in alpine areas between 3300 and 4100 m altitude. It may also occur in mixed forests of Tsuga and Abies in Nepal. 


Zhu L. Yang, Xiao-Xia Ding, G. Kost and K.-H. Rexer. 2017. New Species in the Tricholoma pardinum Complex from Eastern Himalaya.
 Phytotaxa.  305(1); 1–10. DOI:  10.11646/phytotaxa.305.1.1

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